A pass box lets materials move between two rooms of different cleanliness levels without anyone walking through, so the clean area stays protected. Its two doors are interlocked, meaning only one can open at a time, which keeps air and particles from crossing over. Static models are used for general transfer, while dynamic ones add HEPA-filtered airflow and a UV lamp to clean items as... https://cronaxcleanroom.com/cleanroom-passbox-manufacturers-in-india/